Self-starter.



00 O 9 l 4 1 P A D E T N E T A P W. 0. LUM. SELF STARTER. APPLICATION FILED AUG. 6, 1906 I lnvenfor:

w tnesses:

. mew

enmiorrrcn...

WALTER o. LUM, or scHENEc'rADY, NEW'YORK, ASSIGNOR T GENERAL ELECTRIC COMPANY,

A CORPORATION or NEW YORK.

SELF-$TARTER.

To all whom i t may concern:

Be it known that I, WALTER O. LuM, a citizen. oi the United States, residing at Schenectady, county of Schenectady, State of N e "York, have invented certain new and useful Improvements in Self-Starters,- of j which. the following is a specification. I This invention relotes'to devices for controlling electric circuits and has for its object thcprovision of a device of this character whereby the electric circuitnmy be autorna-tically controlled in a very reliable, safe and efficient manner by the simple closing of -a control circuit.

- 1y invention relates more specifically to devices for starting electric motors. Asis well-known, it is the common practice .in the starting of electric"motors to include o sulliricnt resist :tnce in series with the motor ornnitn'rc to prevent it dangerous rush of cnr-, rent and thou grodunllvcut out the starting resistance. Devices of this kind are usually hand-operatel, although :mtonmtic devices have been devised for :tcttolnPliShiflg this resuit. in the use of automaticstarters some means mustusuallv he provided for obtnining it time element between the successive operations which cut out the resistance. Vnri 1 I ous methods for accomplishing, this result feol-h d ashnve been devised, such the use of or less pots and the like, all of which are more unsatisfactory. i In carrying outmy invention, l moire use I fof. a thermostatic de ice for controlling the 1.35 successive operetions, the thermostatic de- 7 Vice being, arranged so that it will come up to a. suflicient tern erature to cause theshortcircuitingswitci to operate in o predetermined time. 14o My invention comprises, therefore, t se- 1 ries of switches arranged to successively short circuit sections of startingresistance,

these switches being cc to nted by solen ()l( is or javm pre ereblv two windings; one for holding the switch in e closed posit on after i it is once operated, and the other acting in other ehwtromzurnetic rhesus-pooh solenoid conjunction witli the holding coil to operate,

l l l Specification of Letters Patent. Application filed August 6, 1906. Serial No.

coil hav ednpted to heat a.

once, reduces the c licient to o J sistnnco coi until the the to 0 high actuating coil will switch, which, in add thereupon lose a. cor tact whi 1n the main line, opens circuit.

is closed through the mostut and operating; coll.

crating coil, leaving mg a contact which is ads between a pair of terminals, 'V rent is first switched on to the solenoid, the. operating coil is in series with resistuiwc or thermostatic coil.

thereupon actuate ltion to closing a circuit Patented April 14, 1908.

thermostatic couple .ted to move hen the curthe thermo being of high resistnrrent so that it is not sul crate the switch.

The high rerises in tcm eroturc rmostatic arm moves su iciently ch shortw-ircuits the The the the circuit of the oponly the holding coil in At the some time the control circuit next succeeding ther- 1 also provide means whereby, when the last of the series oi switches swl tches are llnt and lost switches I0 motor is If; actuated, the intermediate deenergizcd,

so that only the ol' the series will be to hold them closed when running with the starting reiort cn'cmted.

By 0 polling the switch in series with the holding, coils of the first and lost switches the motor may he qulcklv stopped.

11 t re accompanying drawing I have illus tinted in a. somewhat diegronmmtic form one emhodim undersl m and modifications there elves to those skilled 1n the art without de- IlGXfP-t it efcrruig notor srlmitnr:

while R, und ond R whicherc in sci at starting. out these resistance switches S, S,

vice, us it Iln order ng coil and an opernti these switches are show nore or less out of my invention. )(l, lmwtwer, that this 1s merely illustrative it should he orrnngemen t d that many cl'lnnges in will suggest themspirit of my invention as l claims.

represent resistances 'H-BHWlllll the motor ornmtnre to automatically cut s, I provide a series of S, and ouch having a. holdnpg'coil; in the dc lustrnted in the drawing. four oi n, although of course may be provided, desired,

The first of, the switches is for closing the armature circuit, em vided with n o bridge the cont-nets 2 v the core l extending l for this purpose is probridging contoctor 1,

arranged and 3 when operated \\'ll3lllll the operntmg 'tice.

ward or ecerggsecl position, and 8 and 9, when in its lower or il'-llfgmil position, I

while a similsr contractor 5 is eilsptcrl when raiseto bridge contact-s and 9. Switch S, S and S' ere similarly constructed iii the exception of the coutsctor 5 and contacts $1 and 9", being provic cl with an operatin coil. 3 "3 soil respectively, curl i *3 111g coils ll; H and 5?. Switch 55 2 having two additional c011- and Z cooperating ith contacts 2 and 13 re pccti' The I when operated, short-circuits the resistance R 5% SiIOIl'rClICUllJS rethe switch sistsuecs R and R; while switch S short circuits resistances l t, 1. and H placing the motor armature directly across the line. in series wil each of the operating coils U and ll W tliiermoststs T, T T rc- These thermostats may he of ell-lmowi'i construction. in ilOWGsn W shown form l to ilaslilc and which rule or iililierent out i he used i "We iouuil that iron 1: sctisfscto y combinethe .iuiuium 170i! is resist nee heating}; coil 1.1, which coil in series w. th the opcratiug coil i es mi of the coil being in. contact with the her itself. The eluminni 11 hair 10 the iron be 12 are jo ned together so cstc form a conteetor 13, adapted to move be- 1 the terminals l4 and 15. The urr m rit is such. that when no current is the hosting coil the concmcnt with the terminal sci v 1 coil ii is heated the con actor L, moves over curl closes the circuit at criminal Thermostat T is similarly crengecl, while tlicrmest has the &1(l(liiensl lecture of it pro acting insulating rod a .cpteol to be orig a projection 17 t core 18 of .ch This arrange-- sent is for the purpose of holding the then mestet T in a, position slmrt-circuitiing the thermostat coil when once it has been moved, as hciQnsftcr described. Tile holding cofls H curl H cl the list curl i switches,;rej, are connected in gi-crsllcl across the former having a switch in Around wound s h" e main st Z through contacts-r i to line M32. The holding CGllS i inc i are ill couthe 11* e, -rom contact S to i'iegntlvs mam st 33, but in ser; s

I 4 v with the contacts e oi the last switch, and

nested in parallel ac oss a riormelly open operating switch 21' is rsug for closing the circuits through ti-.41: thcrmostuts and the first operating coil.

The opemticn of my device and the EFT-- raugcment of circuits is es follows: 22 and represent, respectively, the positive and neective mains of a supply circuit. When opera-ting JilZCll 21 is closed, the control. air cui't will "occompleted as follows: from msin 22 to 24, through wire 25, to thei'iz'iostat T, thence to terminal 26, wire 27, terminal 28, wire 2? terminal 15, wire 30, operating coil 0, switch 21, contactor 5, and wire 31, back to line at 32. The core lwill nowbe lifted, bridging the contacts 2 and. 3 to close the armature circuit through resistances R- R- and. it coming back on to the line at 33, and. bridging contacts 8 and 9 so as to enerholillng coil H. The contnctor like a Wise breaks the circuit between contacts 8 end 9 which dener izcs the operating coil O and at the same time bridges contacts 3 and 1 The bri of contacts 2 and 3 likewise energizes holding coils H, H and H 'loe holding coil ll holds the core 4 in. its raised position, and th bridging oi the contacts 6 and 7 completes the circuit through the coil 3 1 of the thermostat T, and through coil O The control circuit, lacing broken between the contacts and 2;, can. no longer go through conductor 30, and hence will pass from Wire 29, through coil 11, to terminal 1%, thence through Wire 34, operating coil 0, across contsctor 35, thence across contacts 0 and 7, sud bad by Wire-31 to line at 32. 'i be operating coil 0 new energized, but not sufiicieutly to lift its core, since it has in series with it the high resistance windiiig 11. This coil 111 now heats ace in s predetev mined llil'llfi interval causes the coutcctor 13 to sl 7; from terminal to terminal 14, thereby cutting out the high resistance coil H) and causing the pc1eting coil 0 to lift its core. Coutavctor 36 is thereupon lifted, short-circuitiug the resistance R, and contactor is likewise lifted so as to bridge contacts 37 and 38 to complete the circuit through the operating coil 0 and. the thermostat of the next succeeding switch S The operation just described is repeated in connection vwith the switch S ind contactor is lifted, which short-circuits resistances 12. curl ltl at the SELIDQ tixuecogntactcr :0 is lifted to close the circuit through operating coil 3 and the heating coil of l3l1.8ill10$\2&l3 T. is; rlcscrihecl connection with switches S and. SI, core 18 of switch is E ted, bridgiug cont-cots 41. and 42 With contactoi 43, hereby short-circuiting resistances R, and and ll and placing the motor armature directly across the line, with centectors 1 and 43 in series. (lore 18, being raised, llolds the arm 160i therim'istct T in its upper posiv ssemi inost ats'l and '1 at the terminal 26. The opening of the thermostatic circuit as 26 pIeVGDtSthG energizing of the coils and 0 when the cores of switches S and F) are,

dropped and the circuit of the coil 0" is o enedat contacts 12 and 13. The circuit 0 the two holding coils H and H is broken V l at contacts and 11 when the switch S is l operated, thus allowing switches S and S to open. It will thus be seen that the armature is "placed directly across the line with. only t is two switches S and S in circuit. By

, openiii -the switch 19 the circuit of the hoh mg coil H. is opened, thereby opening the 5 armature. circuit and dencrgizing coil ll.

Thus, the mere closing of a single switch sets the motor starting switches in opcratiini to successively cut out the resistance. and the {opening ot a switch which is normally closed 20 will stop the motor and return the parts to the original position.

*What I claim as new, and desireto' secure lay Letters Patent of the United States, is,

1. An autoin-iitic circuit controller, comprising a plurality of switches and thermostatic means for successively controlling the some;

ccssivcly controlliin 1, An automatic circuit controller, comprising a plurality of electro-magnetic switches and thermostatic means for soc the same. Iv & I I, o. no automatic circuit cimtrollcr, cone pr .\g a plurality ol" clcctro-1nagnetic swi hes and a plurality of thermostatul'or successively controlling said hes. 4. An automatic circuit controller, con1- prising a plurality of electro magnetic 4 switches and thermostatic devices 111 series with the magnet coils of said switches for I successively mini-rolling the so inc.

5. An automatic circuit controller, coniprisnig a plurality of clcctro magnetic switches each having; an operating coil and. a

holding coil, and t holding; coil, and llu-irmostatic devices in cir' cult with the operating coils lor successively controlling said switches.

6, An automatic circuit ('t)'l\l'=lfllll?l', con prising a plurality of elcctro magi'ictic switches each having an operating coil and a \ermostn 'i' devices in sc ting coils "for successively rics with tho on controlling said min-hes.

I 7. Aii'iuitmi:==. tic circuit controller, coinprising a plurality of elecizro magnetic switches each having an operating coil and a holding coil, and thermostatic devices in scries with said controlling coils for (directing the operation of tho switches.

'8. An automatic circuit controller, com

prising a pluralii of switches and thermostatic lllHillS controlled lrvoncol'said switches forcll'ccting' thc opcration oi' the other.

S). An automatic circuit controller, coniprising; a plurality ol' switches each having an operating coil and a, holdin coil, and a thermostatic device in series with the operating coil of one of said switches for controlling the said switch.

10. An automatic circuit controller, (mirprising a plurality of switches each having an operating coil and a holdin coil, and a thermostatic device in series wit the operating coil of one of said switches and controlled by the other for effecting the operation of the formei. I

11. An auometic circuit controller, comprising a plurality of switches, electro-nntgnetic devices for actuating the same, therlnostatic means for successively controlling the actuating devices, and means controlled by the last of the series'oi switches for de energizing others of the series.

12. An automatic circuit controller, comprising a plurality of switches,electro-1nagnetie devices for actuating the same each having anoperatingcoil and a holding coil, thermostatic means for successivelycontroh ling the operating coils, and means whereby the actuation of one of said switches denergizes its operating coil and energizes the oper ating coil of the next succeeding switch.

13. An. automatic circuit controller, come prismga plurality of switcl'ics, elcctro magnctic devices For actuating the same, thcrmostatic means for successively controlling said devices, and means whereby the activation of one of said switches (loncrgizes its controlling device and energizes the device of the next succeeding switch.

14. An automatic circuit controller, comprising a )luralit of clectro magnetic switches one i having an operating coil and a thermostatic device in series therewith, said iilevice comprising a high resistance winding and, means controlled by the temperature oil said winding for short-circuiting the same to actuate the switch.

15. An automatic circuit controller, coin- -pr ising a plurality of switches, elective-maguetic'devices for actuating the same, a thcrniostat in series with each of said devices cinnprisinga high resistance coil, means con snow, and means controllcr'l by one of said swim-hes for denergi-zing other of said I the operation 0% the last of the series cf 10 switches. i switches denergizes intermediete switches. 18. The combination with an electricmo- In witness whereof I hereunto set my hand my, 'of alurality ofresistances in cirthis ithd yof August, 1906.

cm t therewith, thel mdstat lcally ee trol led I WALTER O XXL-TM swltahes for successlvely short-cucmtmg @he same means controlled by one of said itnesses: 1

switches for efleeting the operation 01 the BENJAMSN.B. :HULL,

next succeeding switch and means whereby (-l-mee M. liAIIlGAN. 

